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PARTI <br />Page No. 1 ] <br />Permit No.: CO-0038776 <br />2. Stormwater Requirements <br />a. Stormwater Management Plan <br />A current Stormwater Management Plan (SWMP) shall be maintained for the portions of the West Elk Mine that are covered by <br />this section of the perrrlit. The SWMP shall be prepared in accordance with good engineering ractices. (The plan need not be <br />completed by a registered engineer.) The plan shall rdentrfy potential sources of pollutionincluding sediment) which may <br />reasonably be expected to affect the quality of stormwater dischazges associated with the inactive nosing opperation. In addition, <br />the plan shall describe and ensure the implementation of best management practices (BMPs) which will be used to reduce the <br />pollutants in siormwater dischazges assoclated with the inactive mining operation and to assure compliance with the terms and <br />condrhons of this permit. . <br />Mountain Coal Co. must implement the provisions of their SWMP as a condition of this permit. The Division reserves the right <br />to review the plan, and to require additional measures [o prevent and control pollution as needed. <br />SWMPs which met criteria contained in the previous version of this perrrlit are acceptable. <br />Active Minin¢ Areas <br />The SWMP shall include the following items for active portions of the mine, at a tninimum <br />i) Desciotion of Mining Activities <br />The plan shall provide a sanative description of the mining and associated activities taking place at [he site which affect or <br />may affect stormwater runoff intended to be covered by tbrs pemut. The natraRVe description shall report the total acreage <br />within the mine site and an estimate of the number of acres of disturbed area. A general description of the location of the <br />mining site relative to major transportation routes and communities shall also be provided. <br />ii) Area Subiect to Effluent Limitations Guidelines <br />Each pplan shall describe the portion of the mining site which contributes runoff to areas subject to effluent limitations <br />guidelines contained in 40 CFR subchapter N. <br />iii) Site Man <br />Each plan shall provide a site map or maps which indicate at a minimum: <br />- mining/milling site boundaries and access and haul roads; <br />- equipment storage, fueling and maintenance azeas; <br />- matenals handling areas; <br />- areas used for storage of overburden, materials, soils or wastes; <br />- azeas used for outdoor manufacturing, storage or disposal of materials; <br />- location of mine drainage or any other process water; <br />- tailings piles/ponds, both new and pre-existing; <br />- mine drainage or any other process water discharge points; <br />- springs, streams, wetlands and other surface waters; and <br />- boundary of azea that contributes runoff to outfalls that aze subject to effiuent limitations guidelines. <br />For chose azeas outside of the area that contributes runoff to outfalls that are subject to effiueat limitations guidelines: <br />- an estimate of the duection(s) of surface flow; <br />- stonnwater outfalls and an outline of the drainage azea of each stormwater outfall; <br />- each existing structural control measure to reduce pollutants in stormwater nmoff; and <br />- the location of impervious structures (e.g. pazking lots, roofs, etc.) <br />iv) Stormwater Management Controls <br />Mountain Coal Co. shall develop a description of stormwater quality controls appropriate for that site, and implenient such <br />controls. The appropriateness and prionhes of controls in the plan shall reflect rdenttfied potential sources of pollutants at <br />the mining site. The description of stormwater quality controls shall address the following rmmmum components, including <br />a schedule for implementing such controls: <br />a) SWMP Adadnistrator -The SWMP shall idenn'fy a specific individual or individuals within the mining organization <br />who is responsible for developing the SWMP and asstshng the mine operator in its implementation, maintenance, and <br />revision. a activities and responsibilities of the administrator shall address all aspects of the facility's SWMP. <br />b) Identification of Potential Pollutant Sources and Best Management Practices -The SWMP shall identify potential <br />sources of pollutants at the site, and assess the potential of these sources to contribute pollutants to stormwater <br />dischaz es associated with mining activities. The SWMP must also describe appropriate Best Management Practices <br />(BMPs~to reduce the ppotential of"these sources. to contribute pollutants to stomlwater dischazges. At a murimuxn, each <br />of the ffollowing shall be.evaluated for the reasonable pgtentia for contributing pollutants to mnoff: <br />- loading and unloading operations; <br />- outdoor storage of cheaucals or equipment; <br />- outdoor milling or processing activities; <br />- historic mine drainage; <br />- tailings ponds; <br />- crushing facrhties or significant dust and particulate generating activities; practices; and <br />-stockpiles of overburden, raw material, intermedlate products, byproducts, finished products or waste products. <br />o.~;~P~i an onnna <br />